Simple and Direct sp<sup>3</sup> C–H Bond Arylation of Tetrahydroisoquinolines and Isochromans via 2,3-Dichloro-5,6-dicyano-1,4-benzoquinone Oxidation under Mild Conditions
作者:Wataru Muramatsu、Kimihiro Nakano、Chao-Jun Li
DOI:10.1021/ol401534g
日期:2013.7.19
The 2,3-dichloro-5,6-dicyano-1,4-benzoquinone (DDQ)-mediated sp3C–Hbondarylation of tetrahydroisoquinolines and isochromans is described. The corresponding products were facilely synthesized via a simple nucleophilic addition reaction between readily available aryl Grignard reagents and iminium (or oxonium) cations generated in situ by DDQ oxidation of tetrahydroisoquinolines (or isochromans) under
Organocatalytic Approach for C(sp<sup>3</sup>)–H Bond Arylation, Alkylation, and Amidation of Isochromans under Facile Conditions
作者:Wataru Muramatsu、Kimihiro Nakano
DOI:10.1021/ol5006399
日期:2014.4.4
the synthesis of isochroman derivatives via direct C(sp3)–H bond arylation is described. The oxidation reaction with [bis(trifluoroacetoxy)iodo]benzene facilitates the regeneration of 2,3-dichloro-5,6-dicyano-1,4-benzoquinone in the C(sp3)–H bond arylation of isochroman. The reaction conditions can also be used for alkyl Grignard reagents and amides to afford the corresponding isochroman derivatives.
Efficient C(sp<sup>3</sup>)–H Bond Functionalization of Isochroman by AZADOL Catalysis
作者:Wataru Muramatsu、Kimihiro Nakano
DOI:10.1021/acs.orglett.5b00434
日期:2015.3.20
A novel organocatalytic C(sp(3))-H bond functionalization of isochroman under practical conditions has been developed. In the presence of 5.0 mol % of AZADOL, the catalysis proceeded successfully with a broad range of substrates and nucleophiles in excellent yields.